Phonograph-horn



r. c. LYON.- PHONOGBAPH HORN.

APPLICATION FILED FEB. 2, I920. y

Patented Aug. 10, 1920.

UNITED STATES PATENT OFFICE.

FRED o. LYON, 0F FAYETTE', OHIO.

PHONOGRAPH-HORN- Application led February 2, 1920.

To all whom it may concern:

Be it known that I, FRED C. LYON, a citizen of the United States, residing at Fayette, in the county of Fulton and State of Ohio, have invented certain new and useful Improvements in Phonogra h-Horns, of which the following is a speci cation.

This invention relates to certain new and useful improvements in phonograph horns, and the primary object of the invention is to provide a horn construction which is compact and which at the same time affords. an increased volume of sound and of backtone, color and expression.

A further object of the invention is to provide a novel type of sound regulator.

The invention briefly described, resides in the combined neck, throat and horn proper as constructed and related in a manner to be now described, so as to afford a simple, economical and effective structure which affords an improved rendition of the record.

Figure l, is a top plan view of a cabinet equipped with the present invention:

Fig. 2 is a side elevation of the horn per se, and

Fig. 3 is a section on line 3-3 of Fig. 2.

In proceeding in accordance with the present invention a cast iron or other heavy or solid metal throat l, is employed. This throat has substantially flat top and bottom faces 2 and 3 which latter however relatively diverge as the approach the neck 4. The neck 4 is pre erably of tubular formation and the throat is arranged radially thereof and with its bottom closed by a continuation of the bottom 3 of the throat as at 3. The throat at its outer end flares to a considerable extent and has a somewhat abrupt curve and then terminates in an elongated rectangular outlet mouth 5 to which the inlet end of the horn proper 6 is connected in any1 suitable manner.

he elongated rectangular mouth is important since by actual experiment it has been found that greatly improved tonal values as well as increased volume results by its use. The horn proper 6, is formed of sheet metal as usual and in order to damp same, a preferably inverted V-shaped sheet metal damper 7 is rigidly secured to the top of the horn in advance of the throat l.

The aforementioned divergency imparted to the top and bottom ofthe throat is for the purpose of increasing the effective area Specification of Letters Patent.

Patented Aug. 10, 1920.

serial No. 355,563.

of the throat at its necessarily narrow end or connection with the neck 4:, to thereby effect uniformity of volume of the sound in its passage through the throat to the horn proper. For the purpose of modulating the sound entering the throat and horn, a vertically slidable regulating tube 8, is mounted within the neck 4; and is manipulated by means of a hand engaging element 9 so as to control the area of the inlet opening 10, of the throat as depicted in Fig. 3.

From the foregoing it will be apparent that the sound entering the neck l will lirst encounter the flat top and bottom 2 and 3 of the throat and will then enter the abrupt curved part of the throat spread laterally and finally enter the horn proper. The peculiar shape and formation of the throat effect control of the sound so as to produce a rich', clear and pure tone of uniform quality.

By referring to Fig. l, it will be apparent that the structure is exceedingly compact. The neck 4: is located at an extreme corner of the cabinet interior, while the horn proper has its mouth occupying the entire width of the cabinet. Thus the 'entire space is utilized to the best advantage.

lVhat is claimed is l. In a phonograph horn, a vertical tubular neck, a throat having substantially flat top and bottom walls and having a connection leading into the neck radially of the latter, the-throat being abruptly curved at its outer end and having an elongated rectangular mouth, the top and bottom throat walls adjacent the neck being relatively divergent, a horn connected to the mouth of the throat, and a tubular sound regulator vetically slidable within the throat, the bottom of the throat being continued and eX- tending across and closing the lower end of the neck, the lower end of the sound regulator being formed for seating on the part of the throat bottom wall which extends across the lower end of the neck.

2. In a phonograph horn, a vertical tubular neck, a throat leading into the neck at a side thereof, a horizontal wall closing the lower end of the neck, a horn proper connected to the throat, anda vertical tubular Y ahnt two adjacent Walls forming` a corner of the cabinet, a horn proper formed to have its ends abut each ot' the opposite sides of the cabinet, said horn having its sides convergent to points adjacent the neck, a throat extending radially of the neck, curved forwardly and flared and connected to the rear end of the horn proper, an open-v ended holloW sound control member in the l0 neck, and means to operate the member eX- tending through the adjacent side of the cabinet.

4:. In a phonograph horn, a vertical tubular neck, a' horn having connection with the neck, an open ended hollonY control member in the neck extending across the connection between the horn and neck, and means to operate the control member.

In testimony whereof I affix my signature.'

FRED C. LYON. 

